Re: [PATCH] selftests/clone3: Add gun99 to compile in Makefile.

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On Thu, Nov 26, 2020 at 03:12:14PM +0800, Xingxing Su wrote:
> CFLAGS add -std=gnu99.
> 
> Fllowing build error:
> 
> test_core.c: In function ‘test_cgcore_destroy’:
> test_core.c:87:2: error: ‘for’ loop initial declarations are only
> allowed in C99 mode
>   for (int i = 0; i < 10; i++) {
>   ^
> test_core.c:87:2: note: use option -std=c99 or -std=gnu99 to compile
> your code
> 
> Signed-off-by: Xingxing Su <suxingxing@xxxxxxxxxxx>
> ---

Acked-by: Christian Brauner <christian.brauner@xxxxxxxxxx>

Seems alright to me and apparently some selftests already set. Though
another option would be to just move the declaration. But I don't think
it matters that much here.

I'd change the commit message slightly though:

[PATCH] selftests/clone3: Fix build error

When compiling the selftests with the -std=gnu99 option the build can
fail with

  Fllowing build error:
  
  test_core.c: In function ‘test_cgcore_destroy’:
  test_core.c:87:2: error: ‘for’ loop initial declarations are only
  allowed in C99 mode
    for (int i = 0; i < 10; i++) {
    ^
  test_core.c:87:2: note: use option -std=c99 or -std=gnu99 to compile

Add -std=gnu99 to the clone3 selftest Makefile to fix this.


>  tools/testing/selftests/clone3/Makefile | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/testing/selftests/clone3/Makefile b/tools/testing/selftests/clone3/Makefile
> index ef7564c..88354a8 100644
> --- a/tools/testing/selftests/clone3/Makefile
> +++ b/tools/testing/selftests/clone3/Makefile
> @@ -1,5 +1,5 @@
>  # SPDX-License-Identifier: GPL-2.0
> -CFLAGS += -g -I../../../../usr/include/
> +CFLAGS += -g -std=gnu99 -I../../../../usr/include/ 
>  LDLIBS += -lcap
>  
>  TEST_GEN_PROGS := clone3 clone3_clear_sighand clone3_set_tid \
> -- 
> 1.8.3.1
> 



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